jfm
Well-known member
This is a car post masquerading as a boat post becuase lots of people have petrol boats
Till now I have been cheapskate and never buy Optimax petrol. I assumed it was all bolx/snake oil, like that shell Formula stuff in 1988
The kids dragged me to that J Clarkson supercar show in Earls court yesterday (I resisted but suddenly changed my mind when they confirmed HR Owen were showing a Scaglietti and a warm-up call to the sales folk assured us of a play with it). Anyway there was indeed a big optimax/ferrari stand and the Shell chap there said I was wrong and the MPG improvement paid for the extra cost of optimax, and all the clean burn/smooth running benefits therefore came free.
So tonight the fuel light came on in the car, which has ordinary shell u/leaded in it. So, having 30mins to spare, I went along the same 1mile stretch of near empty dual carriageway at the same speed on cruise control, same gear, and measured the average mpg on the computer. The start/stop for the mpg measure was at constant speed, no accelerating, no traffic got in my way, all in same direction (so inclines not messing up the result). I got 3 readings all in the range 25.1 to 25.3mpg
Then I filled with Optimax (car 110lbs heavier), drove to the same place, did the same run, and got 27.6-27.9mpg. That's about 10% improvement, and cost is 7.0% more (89.9p vs 83.9p). OK this was I suppose a 3/4 arsed experiment but seems to suggest Optimax works out better and cheaper. In which case better for petrol boaters too?
Anyway, it turns out the Scaglietti isn't a tight 2 2 but can actually fit 2 in the back with quite decent legroom. So what does the panel think depreciation will be over 3 years/20k miles?
Till now I have been cheapskate and never buy Optimax petrol. I assumed it was all bolx/snake oil, like that shell Formula stuff in 1988
The kids dragged me to that J Clarkson supercar show in Earls court yesterday (I resisted but suddenly changed my mind when they confirmed HR Owen were showing a Scaglietti and a warm-up call to the sales folk assured us of a play with it). Anyway there was indeed a big optimax/ferrari stand and the Shell chap there said I was wrong and the MPG improvement paid for the extra cost of optimax, and all the clean burn/smooth running benefits therefore came free.
So tonight the fuel light came on in the car, which has ordinary shell u/leaded in it. So, having 30mins to spare, I went along the same 1mile stretch of near empty dual carriageway at the same speed on cruise control, same gear, and measured the average mpg on the computer. The start/stop for the mpg measure was at constant speed, no accelerating, no traffic got in my way, all in same direction (so inclines not messing up the result). I got 3 readings all in the range 25.1 to 25.3mpg
Then I filled with Optimax (car 110lbs heavier), drove to the same place, did the same run, and got 27.6-27.9mpg. That's about 10% improvement, and cost is 7.0% more (89.9p vs 83.9p). OK this was I suppose a 3/4 arsed experiment but seems to suggest Optimax works out better and cheaper. In which case better for petrol boaters too?
Anyway, it turns out the Scaglietti isn't a tight 2 2 but can actually fit 2 in the back with quite decent legroom. So what does the panel think depreciation will be over 3 years/20k miles?